Tjernlund Products 950-0471 Fan Prover Kit
The Tjernlund Products 950-0471 Fan Prover Kit is a critical safety interlock designed for commercial PAI-series intake hoods and induction systems. As a veteran-grade pressure switch kit, it serves as the primary mechanism to verify proper airflow before allowing the burner circuit to energize. This OEM Tjernlund 950-0471 assembly features a high-precision diaphragm calibrated to 1.35" WC PF, ensuring that the draft inducer or vent fan is moving sufficient air to prevent hazardous combustion conditions. The kit includes the sensing switch, mounting bracket, and required flexible tubing for a complete field replacement. For technicians troubleshooting HVAC safety switches or draft inducer proving switches, this unit offers a drop-in solution to resolve "no-ignition" codes caused by failing pressure sensors. Maintaining a functional 950-0471 fan prover is essential for compliance with mechanical codes regarding positive airflow verification in gas-fired equipment. Integration is straightforward for existing Tjernlund ventilation systems, utilizing standard blue (common) and yellow (normally open) wiring configurations.
Key Benefits- Fail-Safe Operation: Prevents burner ignition until valid airflow is detected by the 1.35" WC pressure switch, protecting the heat exchanger from overheating.
- OEM Compatibility: Specifically engineered for Tjernlund PAI-7 intake hoods and commercial series in-forcers, eliminating the need for complex field modifications.
- Heavy-Duty Construction: Features a durable mounting bracket and high-grade sensing diaphragm designed to withstand the cyclic nature of industrial HVAC operations.
- Precise Draft Monitoring: Monitors system airflow with industrial accuracy, reducing equipment downtime caused by nuisance trips in low-draft environments.
How do I test if my Tjernlund 950-0471 pressure switch is defective?
Before replacing, confirm the intake hood air inlets and pre-filter screens are clear of debris. Check the flexible sensing tubing for kinks or blockages. If the inducer is running and the tubing is clear but the switch fails to close the circuit across the blue and yellow terminals, the internal diaphragm or contact points may be compromised.
Is this kit compatible with other PAI series hoods?
The 950-0471 is specifically calibrated for the commercial PAI series. While other kits like the 950-0452 exist for smaller PAI-1 or PAI-2 units, using the correct 1.35" WC set point is vital for the safety of larger commercial induction systems.
What wiring configuration should be used for this fan prover?
Standard installation involves connecting the system common to the blue terminal and the normally open (N.O.) lead to the yellow terminal. Always cycle the heating equipment several times after installation to verify the proving sequence.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $107.46
-65%$107.46
$37.61Tjernlund Products 950-0471 Fan Prover Kit
The Tjernlund Products 950-0471 Fan Prover Kit is a critical safety interlock designed for commercial PAI-series intake hoods and induction systems. As a veteran-grade pressure switch kit, it serves as the primary mechanism to verify proper airflow before allowing the burner circuit to energize. This OEM Tjernlund 950-0471 assembly features a high-precision diaphragm calibrated to 1.35" WC PF, ensuring that the draft inducer or vent fan is moving sufficient air to prevent hazardous combustion conditions. The kit includes the sensing switch, mounting bracket, and required flexible tubing for a complete field replacement. For technicians troubleshooting HVAC safety switches or draft inducer proving switches, this unit offers a drop-in solution to resolve "no-ignition" codes caused by failing pressure sensors. Maintaining a functional 950-0471 fan prover is essential for compliance with mechanical codes regarding positive airflow verification in gas-fired equipment. Integration is straightforward for existing Tjernlund ventilation systems, utilizing standard blue (common) and yellow (normally open) wiring configurations.
Key Benefits- Fail-Safe Operation: Prevents burner ignition until valid airflow is detected by the 1.35" WC pressure switch, protecting the heat exchanger from overheating.
- OEM Compatibility: Specifically engineered for Tjernlund PAI-7 intake hoods and commercial series in-forcers, eliminating the need for complex field modifications.
- Heavy-Duty Construction: Features a durable mounting bracket and high-grade sensing diaphragm designed to withstand the cyclic nature of industrial HVAC operations.
- Precise Draft Monitoring: Monitors system airflow with industrial accuracy, reducing equipment downtime caused by nuisance trips in low-draft environments.
How do I test if my Tjernlund 950-0471 pressure switch is defective?
Before replacing, confirm the intake hood air inlets and pre-filter screens are clear of debris. Check the flexible sensing tubing for kinks or blockages. If the inducer is running and the tubing is clear but the switch fails to close the circuit across the blue and yellow terminals, the internal diaphragm or contact points may be compromised.
Is this kit compatible with other PAI series hoods?
The 950-0471 is specifically calibrated for the commercial PAI series. While other kits like the 950-0452 exist for smaller PAI-1 or PAI-2 units, using the correct 1.35" WC set point is vital for the safety of larger commercial induction systems.
What wiring configuration should be used for this fan prover?
Standard installation involves connecting the system common to the blue terminal and the normally open (N.O.) lead to the yellow terminal. Always cycle the heating equipment several times after installation to verify the proving sequence.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Tjernlund Products 950-0471 Fan Prover Kit is a critical safety interlock designed for commercial PAI-series intake hoods and induction systems. As a veteran-grade pressure switch kit, it serves as the primary mechanism to verify proper airflow before allowing the burner circuit to energize. This OEM Tjernlund 950-0471 assembly features a high-precision diaphragm calibrated to 1.35" WC PF, ensuring that the draft inducer or vent fan is moving sufficient air to prevent hazardous combustion conditions. The kit includes the sensing switch, mounting bracket, and required flexible tubing for a complete field replacement. For technicians troubleshooting HVAC safety switches or draft inducer proving switches, this unit offers a drop-in solution to resolve "no-ignition" codes caused by failing pressure sensors. Maintaining a functional 950-0471 fan prover is essential for compliance with mechanical codes regarding positive airflow verification in gas-fired equipment. Integration is straightforward for existing Tjernlund ventilation systems, utilizing standard blue (common) and yellow (normally open) wiring configurations.
Key Benefits- Fail-Safe Operation: Prevents burner ignition until valid airflow is detected by the 1.35" WC pressure switch, protecting the heat exchanger from overheating.
- OEM Compatibility: Specifically engineered for Tjernlund PAI-7 intake hoods and commercial series in-forcers, eliminating the need for complex field modifications.
- Heavy-Duty Construction: Features a durable mounting bracket and high-grade sensing diaphragm designed to withstand the cyclic nature of industrial HVAC operations.
- Precise Draft Monitoring: Monitors system airflow with industrial accuracy, reducing equipment downtime caused by nuisance trips in low-draft environments.
How do I test if my Tjernlund 950-0471 pressure switch is defective?
Before replacing, confirm the intake hood air inlets and pre-filter screens are clear of debris. Check the flexible sensing tubing for kinks or blockages. If the inducer is running and the tubing is clear but the switch fails to close the circuit across the blue and yellow terminals, the internal diaphragm or contact points may be compromised.
Is this kit compatible with other PAI series hoods?
The 950-0471 is specifically calibrated for the commercial PAI series. While other kits like the 950-0452 exist for smaller PAI-1 or PAI-2 units, using the correct 1.35" WC set point is vital for the safety of larger commercial induction systems.
What wiring configuration should be used for this fan prover?
Standard installation involves connecting the system common to the blue terminal and the normally open (N.O.) lead to the yellow terminal. Always cycle the heating equipment several times after installation to verify the proving sequence.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
